拱坝冲击破坏的数字图像相关研究  

Study of Digital Image Correlation for Impact Damage of Arch Dam

作　　者：雷冬[1,2] 任青文[2] 王山山[2] 乔丕忠[1,2] 

机构地区：[1]河海大学水文水资源与水利工程科学国家重点实验室,江苏南京210098 [2]河海大学力学与材料学院,江苏南京210098

出　　处：《水电能源科学》2012年第1期70-71,215,共3页Water Resources and Power

基　　金：国家自然科学基金资助项目(11002048;10972072;11132003);国家重点基础研究发展计划(973计划)基金资助项目(2007CB714104);水文水资源与水利工程科学国家重点实验室专项经费基金资助项目(2011585912;2009585912)

摘　　要：以小湾拱坝模型为例,针对试验模型在冲击荷载作用下的破坏问题,采用数字图像相关技术分析了受冲击后拱坝模型下游面的全场变形。在顺河向水平冲击荷载作用下,较小荷载作用时坝体未发现明显裂纹,但经数字图像相关分析发现局部已严重损伤;在较大荷载作用后坝体发生整体失效破坏,破坏与损伤位置吻合。研究结果表明,数字图像相关技术可用于大坝损伤检测和监测,且精度较高。Digital image correlation technique is conducted to study the damage of Xiaowan arch model under impact load. Full-field deformation of downstream face of arch dam is measured. After small impact load with direction along the river, there is no distinct crack on the face of dam. But serious damage appeared at local position with high strain measured by digital image correlation technique; Under action of large impact load, the whole failure is occurred at the site of cracking. This research indicates that digital image correlation technique can be used to detection and monitoring of the dam damage with high precision.

关 键 词：冲击破坏 模型试验 数字图像相关 变形测量 

分 类 号：TV32[水利工程—水工结构工程] TU45[建筑科学—岩土工程]